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Understanding the hydrological response of a headwater-dominated catchment by analysis of distributed surface–subsurface interactions

Özgen-Xian, Ilhan; Molins, Sergi; Johnson, Rachel M.; Xu, Zexuan; Dwivedi, Dipankar; Loritz, Ralf 1; Mital, Utkarsh; Ulrich, Craig; Yan, Qina; Steefel, Carl I.
1 Institut für Wasser und Gewässerentwicklung (IWG), Karlsruher Institut für Technologie (KIT)

Abstract:

We computationally explore the relationship between surface–subsurface exchange and hydrological response in a headwater-dominated high elevation, mountainous catchment in East River Watershed, Colorado, USA. In order to isolate the effect of surface–subsurface exchange on the hydrological response, we compare three model variations that differ only in soil permeability. Traditional methods of hydrograph analysis that have been developed for headwater catchments may fail to properly characterize catchments, where catchment response is tightly coupled to headwater inflow. Analyzing the spatially distributed hydrological response of such catchments gives additional information on the catchment functioning. Thus, we compute hydrographs, hydrological indices, and spatio-temporal distributions of hydrological variables. The indices and distributions are then linked to the hydrograph at the outlet of the catchment. Our results show that changes in the surface–subsurface exchange fluxes trigger different flow regimes, connectivity dynamics, and runoff generation mechanisms inside the catchment, and hence, affect the distributed hydrological response. ... mehr


Verlagsausgabe §
DOI: 10.5445/IR/1000157726
Veröffentlicht am 19.04.2023
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Wasser und Gewässerentwicklung (IWG)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2023
Sprache Englisch
Identifikator ISSN: 2045-2322
KITopen-ID: 1000157726
Erschienen in Scientific Reports
Verlag Nature Research
Band 13
Heft 1
Seiten Art.-Nr.: 4669
Vorab online veröffentlicht am 22.03.2023
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